Wednesday, March 9, 2011

Weby wednesday!

Today in class we wrote down our homework, did the plant of the day, then did UP page 61 in class with our lab groups. Then we got a head start on our homework which was up pages 67-68.

Plant of the day;

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Spider plant
-Self-propagating
"plantlets" (aka "spider babies") can take root in soil
- Produces fleshy tuberous roots
-Native to South Africa
-Common houseplant
-Produces white flowers


Notes about energy

What is energy?
The ability to do work
It can change form
It is never destroyed or created

Forms of energy;
Light, electric, and chemical
Chemical energy is stored in the electrons of the chemical bonds

Energy is used to do everything in living things

What do we know about photosynthesis?
It converts energy
Plants do it
Requires sunlight, carbon dioxide and oxygen

Describe the structures of a leaf that allow it to carry out the function of photosynthesis.
It is flat to absorb sunlight and has a spongy mesophyll that allows carbon dioxide in
Has chloroplasts
Has veins that are made up of 2 tissue, phloem-carries sugar away from the leaf and Xylem which carries water
A cuticle that prevents water loss
and a palisade mesophyll that has lots of chloroplasts at the top

Why should you wear a white shirt on a hot day, not a dark shirt?
The white shirt reflects all sunlight while the black shirt absorbs all sunlight

Notes about Lights and pigments;
Light travels in waves
Colors have different wave lengths
"white" light is a mixture of all colors in the visible spectrum
plant pigments absorb sunlight
chlorophyll- green pigment needed for photosynthesis

Hope that helps!

The next scribe will be Emma.


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